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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Write something better than
O(n²).kata hint != kata suggestion
This comment is hidden because it contains spoiler information about the solution
If it ever is, then yes. But it looks like it was unpublished at some point.
You cannot submit solutions to a draft. The kata is not published, and currently it does not accept solutions.
That's because this kata is a Draft, there is no Submit button in this state.